<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#propdef-anchor-name">
<link rel="author" href="mailto:[email protected]">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
#container {
position: relative;
transform: translate(0, 0); /* Make it a containing block. */
}
#anchor1 {
anchor-name: --a1;
width: 5px;
height: 7px;
background: orange;
}
#anchor2 {
anchor-name: --a2;
width: 9px;
height: 11px;
background: blue;
}
#anchor3 {
anchor-name: --a3;
width: 13px;
height: 15px;
background: purple;
}
.target {
position: absolute;
}
</style>
<!--
The anchors are in different containing blocks, but they still fulfill the
conditions:
* if it has a different containing block from the querying element, the last
containing block in its containing block chain before reaching the querying
element’s containing block is not, itself, positioned.
https://drafts.csswg.org/css-anchor-1/#determining
From the definition of the "containing block":
https://drafts.csswg.org/css-position/#def-cb
properties such as `transform` can create a containing block without setting
the `position` property.
-->
<body onload="checkLayoutForAnchorPos('.target')">
<div id="container">
<div>
<div id="anchor1"></div>
</div>
<div class="target" style="left: anchor(--a1 right)" data-offset-x=5></div>
<div>
<div style="transform: translate(0, 0)">
<div style="position: absolute; left: 10px;">
<div id="anchor2"></div>
</div>
</div>
</div>
<div class="target" style="left: anchor(--a2 right)" data-offset-x=19></div>
<div>
<div style="transform: translate(0, 0)">
<div style="position: fixed; left: 20px">
<div id="anchor3"></div>
</div>
</div>
</div>
<div class="target" style="left: anchor(--a3 right)" data-offset-x=33></div>
</div>
</body>
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